90799999 has 2 divisors, whose sum is σ = 90800000. Its totient is φ = 90799998.

The previous prime is 90799987. The next prime is 90800011. The reversal of 90799999 is 99999709.

It is a balanced prime because it is at equal distance from previous prime (90799987) and next prime (90800011).

It is a cyclic number.

It is not a de Polignac number, because 90799999 - 2⁵ = 90799967 is a prime.

90799999 is a modest number, since divided by 9999 gives 9079 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90799979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45399999 + 45400000.

It is an arithmetic number, because the mean of its divisors is an integer number (45400000).

Almost surely, 2^90799999 is an apocalyptic number.

90799999 is a deficient number, since it is larger than the sum of its proper divisors (1).

90799999 is an equidigital number, since it uses as much as digits as its factorization.

90799999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3720087, while the sum is 61.

The square root of 90799999 is about 9528.9033471853. The cubic root of 90799999 is about 449.4643816563.

The spelling of 90799999 in words is "ninety million, seven hundred ninety-nine thousand, nine hundred ninety-nine".